Following is a selection of measures discussed ahead of Chancellor George Osborne's annual budget statement to parliament:
50 PENCE TAX RATE
Osborne has been facing growing calls from within his own Conservative party to ditch the 50 pence tax on people earning more than 150,000 pounds a year.
The finance ministry is expected to publish a study into the tax, which is seen showing it generates much less in revenue than the 2.6 bln pounds initially assumed.
British media reported on Friday that the Treasury was looking into reducing the top tax rate to 45 or 40 pence.
The 50 pence rate was introduced by the previous Labour government in 2010.
TYCOON – MANSION TAX
Liberal Democrat leader Nick Clegg has proposed levying a flat-rate tax of around 20% on the super-rich, a so-called "Tycoon Tax" to target those who pay little tax on their earnings thanks to complex avoidance schemes.
The LibDems have long wanted to impose a "Mansion Tax" on properties worth over 2 mln pounds.
CHILD BENEFIT
There are also growing calls for Osborne to abandon or soften plans to withdraw child benefit payments to families with one higher-rate taxpayer, amid concerns that families with only one breadwinner could be particularly hard hit.
Families with children currently receive 20.32 pounds per week for the first child and 13.40 pounds for each subsequent child.
CORPORATION TAX
The government has pledged to cut corporation tax to 23% by 2014 but has faced calls to lower it further to 20%.
CAPITAL ALLOWANCE
Businesses have called for a time-limited capital allowance scheme for medium-sized companies, allowing them to offset investment in plant, machinery and buildings against corporation tax.
So far, the government plans to cut current capital allowances as part of its plan to reduce corporation tax.
INCOME TAX THRESHOLD
The Liberal Democrats have lobbied for the government to raise the earnings threshold at which income tax kicks in faster than planned to 10,000 pounds.
FUEL DUTY
Osborne has twice deferred plans to raise fuel duty due to high oil prices. Unless he announces a further postponement of the increase, fuel duty will go up by the same amount as the retail price index on August 1.
BANK LEVY
Osborne raised the levy on banks' balance sheets to 0.088% from January 2012.
LOAN GUARANTEE
The government will launch its flagship credit easing scheme to encourage bank lending to small businesses. The aim is to reduce the cost of borrowing for small firms by backing up to 20 bln pounds of bank lending with state guarantees.
The scheme is targeted at firms with a turnover of up to 50 mln pounds, although business groups are sceptical that it will make a big difference, with many firms complaining that stringent lending terms are a bigger obstacle to obtaining credit than the cost of borrowing.
